Njabulo Stainless is a reputable manufacturer and supplier of Stainless Steel 440B Nuts, proudly based in Cape Town, South Africa. The company focuses on crafting top-notch stainless steel fasteners that offer remarkable hardness, strength, and resistance to corrosion. Their Stainless Steel 440B Nuts are specifically engineered for tough industrial and mechanical applications where durability and wear resistance are essential. With state-of-the-art manufacturing facilities and rigorous quality control measures, Njabulo Stainless ensures that their precision-engineered nuts meet international standards, providing secure and dependable fastening solutions for machinery, equipment, and structural assemblies across various industries.
These Stainless Steel 440B Nuts are primarily made up of iron, chromium (16–18%), carbon (0.60–0.75%), manganese, along with trace amounts of silicon and molybdenum. This high-carbon martensitic stainless steel grade delivers outstanding hardness, tensile strength, and wear resistance after undergoing heat treatment. The nuts boast a tensile strength ranging from approximately 760 to 1,200 MPa, a yield strength of about 450 to 900 MPa, and impressive toughness, making them perfect for high-stress and precision applications. Their corrosion resistance, paired with exceptional mechanical properties, guarantees long-lasting performance even in the most challenging environments.
C | Si | Mn | P | S | N | Cr | Cu | Mo | Ni | Ti | V |
|---|---|---|---|---|---|---|---|---|---|---|---|
0.75 – 0.95 | – | – | – | – | – | 16.00 – 18.00 | – | 0.90 – 1.30 | – | – | 0.07 – 0.12 |
| Tempering Temperature (°C) | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (% in 50mm) | Hardness Rockwell (HR C) | Impact Charpy V (J) |
|---|---|---|---|---|---|
| Annealed* | 758 | 448 | 14 | 269HB max | – |
| 204 | 2030 | 1900 | 4 | 59 | 9 |
| 260 | 1960 | 1830 | 4 | 57 | 9 |
| 316 | 1860 | 1740 | 4 | 56 | 9 |
| 371 | 1790 | 1660 | 4 | 56 | 9 |
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.74 g/cm3 | 0.280 lb/in³ |
| Melting point | 1482°C | 2700°F |
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A corrosion-resistant product, Stainless Steel 440B nuts are available in sizes from M6 to M64. Known for their high strength and hardness, they are ideal for heavy-duty applications in industrial machinery and automotive components.
A corrosion-resistant product, Stainless Steel 440B coupling nuts, used to join two male threads, come in sizes from M6 to M36. They provide exceptional strength and durability, making them suitable for high-stress and heavy-duty applications.
A corrosion-resistant product, Stainless Steel 440B nylon insert nuts, or lock nuts, are available in sizes from M3 to M36. The nylon insert prevents loosening under vibration, offering secure fastening in high-strength and demanding environments.
A corrosion-resistant product, Stainless Steel 440B flange hex nuts feature an integrated flange and come in sizes from M5 to M20. They provide enhanced load distribution and stability, suitable for high-stress and high-temperature applications.
A corrosion-resistant product, Stainless Steel 440B heavy hex nuts are available in sizes from M10 to M48. Their increased thickness and strength make them ideal for heavy-duty applications and high-stress environments requiring robust and secure fastening.
A corrosion-resistant product, Stainless Steel 440B square nuts offer a larger contact surface and come in sizes from M6 to M30. They are ideal for high-strength applications requiring reliable performance in heavy clamping and industrial settings.
Njabulo Stainless ensures high-quality materials with a string of tests for excellence. Stainless Steel 440B Nut goes through proper checks such as hardness testing, spectrochemical analysis, PMI testing, tensile testing, micro and macro structural tests, pitting resistance, and IGC testing. We assure high performance through these strict checks. Supporting our commitment to quality, we provide documentation, such as commercial invoices, packing lists, labels, Certificates of Origin, and Third-Party Inspection Certificates, for customer satisfaction on pricing, delivery, and reliability of the products.
Stainless Steel 440B Nuts find extensive use in industries that demand high strength, wear resistance, and reliable fastening performance. They are particularly suited for aerospace, automotive, industrial machinery, and precision equipment. Moreover, they are utilized in bearings, shafts, gears, and high-load structural assemblies where both mechanical strength and corrosion resistance are vital. The combination of durability, hardness, and reliability makes 440B nuts a top choice for demanding industrial, mechanical, and precision applications.
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